There are similarities between architectures for Federated Information Systems and architectures for Data Warehousing. In the context of an integrated architecture for both Federated Information Systems and Data Ware-housing, we discuss how additional schema levels provide security, and operations to convert from one level to the next.
The Rhizomer platform is a Content Management System (CMS) based on a Resource Oriented Approach (RESTful) and Semantic Web technologies. It achieves a great level of flexibility and provides sophisticated content management services. All content is described using semantic metadata semi-automatically extracted from multimedia content, which enriches the… (More)
The BLOOM (BarceLona Object Oriented Model) data model was developed to be the Canonical Data Model (CDM) of a Federated Database Management System prototype. Its design satisses the features that a data model should have to be suitable as a CDM. The initial version of the model (BLOOM91) has evolved into the present version, BLOOM99. This report speciies… (More)
Semantic Web applications take off is being slower than expected, at least with respect to " real-world " applications and users. One of the main reasons for this lack of adoption is that most Semantic Web user interfaces are still immature from the usability and accessibility points of view. This is due to the novelty of these technologies, but this also… (More)
A newspaper content management system has to deal with a very heterogeneous information space as the experience in the Diari Segre newspaper has shown us. The greatest problem is to harmonise the different ways the involved users (journalist, archivists…) structure the newspaper information space, i.e. news, topics, headlines, etc. Our approach is based on… (More)
This paper presents an approach for thigtly federated database systems with several federated schemas that consist of a schema architecture and a functional architecture. The reference schema architecture has been extended to deal with security aspects not well solved previously. The functional architecture includes the processors needed to build the… (More)
As part of the general growth and diversification of media in different modalities, the presence of information in the form of human speech in the worldwide body of digital content is becoming increasingly significant, in terms of both volume and value. We present a semantic-based search model for human speech corpora, stressing the search for meanings… (More)
Newspapers are evolving and this causes great changes in how newspapers reach their consumers, but also in how newspapers work internally. Advanced computerised support is needed in order to cope with the new needs, which require that machines are aware of a greater part of the underlying semantics. Ontologies and Semantic Web technologies are clear… (More)